Could someone please explain to me what is the difference between a +/- DVD? I have recently bought a Memorex Dual format, double layer, dvd recorder for DVD+ & DVD- recording. I am a virgin when it comes to DVD burners. I do not understand what all the plus and minus signs mean. It also came with Nero software which I upgraded to the 18.104.22.168. Can I rip DVDs using a download of DVD43 in conjuction with nero? Will any of the standalone rippers work with Nero like DVD X ghost? or whatever else there is out there?